GB2320380B - A telephone line interface - Google Patents

A telephone line interface

Info

Publication number
GB2320380B
GB2320380B GB9625776A GB9625776A GB2320380B GB 2320380 B GB2320380 B GB 2320380B GB 9625776 A GB9625776 A GB 9625776A GB 9625776 A GB9625776 A GB 9625776A GB 2320380 B GB2320380 B GB 2320380B
Authority
GB
United Kingdom
Prior art keywords
telephone line
line interface
interface
telephone
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9625776A
Other languages
English (en)
Other versions
GB2320380A (en
GB9625776D0 (en
Inventor
Sten Carlsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Oyj
Original Assignee
Nokia Mobile Phones Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Mobile Phones Ltd filed Critical Nokia Mobile Phones Ltd
Priority to GB9625776A priority Critical patent/GB2320380B/en
Publication of GB9625776D0 publication Critical patent/GB9625776D0/en
Priority to EP97309913A priority patent/EP0848535A3/fr
Priority to US08/988,075 priority patent/US5953409A/en
Publication of GB2320380A publication Critical patent/GB2320380A/en
Application granted granted Critical
Publication of GB2320380B publication Critical patent/GB2320380B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB9625776A 1996-12-11 1996-12-11 A telephone line interface Expired - Fee Related GB2320380B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9625776A GB2320380B (en) 1996-12-11 1996-12-11 A telephone line interface
EP97309913A EP0848535A3 (fr) 1996-12-11 1997-12-09 Interface de lignes téléphoniques
US08/988,075 US5953409A (en) 1996-12-11 1997-12-10 Telephone line interface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9625776A GB2320380B (en) 1996-12-11 1996-12-11 A telephone line interface

Publications (3)

Publication Number Publication Date
GB9625776D0 GB9625776D0 (en) 1997-01-29
GB2320380A GB2320380A (en) 1998-06-17
GB2320380B true GB2320380B (en) 2001-09-12

Family

ID=10804297

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9625776A Expired - Fee Related GB2320380B (en) 1996-12-11 1996-12-11 A telephone line interface

Country Status (3)

Country Link
US (1) US5953409A (fr)
EP (1) EP0848535A3 (fr)
GB (1) GB2320380B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758930A1 (fr) * 1997-01-28 1998-07-31 Philips Electronics Nv Circuit d'alimentation absorbant un courant constant et appareil telephonique mettant en oeuvre un tel circuit
US6198817B1 (en) * 1998-01-23 2001-03-06 International Business Machines Corporation Communication interface having combined shaping of receive response and synthesized matching terminating impedances for different frequency bands and a design method therefor
KR100506233B1 (ko) * 1999-10-27 2005-09-02 삼성전자주식회사 비대칭 디지털 가입자선 시스템에서 홈 네트웍 시스템
US7020274B1 (en) * 2000-04-26 2006-03-28 Agilent Technologies, Inc. Universal apparatus and method for interfacing signals with telephony networks
CN102006028B (zh) * 2010-11-15 2014-07-02 中兴通讯股份有限公司 一种阻抗匹配的方法及电路

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828281A (en) * 1973-02-26 1974-08-06 Lorain Prod Corp Impedance simulating circuit for transmission lines
US3989907A (en) * 1975-03-20 1976-11-02 Lorain Products Corporation Repeater for transmission lines of differing lengths
US4032726A (en) * 1975-03-20 1977-06-28 Lorain Products Corporation Repeater for transmission lines of differing lengths
US4359609A (en) * 1980-06-20 1982-11-16 Advanced Micro Devices, Inc. Circuit with feedback for controlling the impedance thereof

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1263384A (en) * 1968-06-03 1972-02-09 Sits Soc It Telecom Siemens Subscriber telephone sets
US4037066A (en) * 1975-03-20 1977-07-19 Lorain Products Corporation Repeater for transmission lines
US3989906A (en) * 1975-03-20 1976-11-02 Lorain Products Corporation Repeater for transmission lines
US4350964A (en) * 1979-06-04 1982-09-21 Tellabs, Inc. Impedance generator circuit
US4456991A (en) * 1981-09-18 1984-06-26 International Telephone And Telegraph Corporation Telephone line circuit and system
US5333192A (en) * 1990-06-26 1994-07-26 Northern Telecom Limited Line interface circuit
GB9308168D0 (en) * 1993-04-20 1993-06-02 Madge Network Limited Impedance matching
GB2289188B (en) * 1994-04-26 1998-09-09 Motorola Inc Telephone line interface cicuit
US5598467A (en) * 1994-12-09 1997-01-28 National Semiconductor Corporation Signal interface circuit with selectable signal interface parameters
US5559440A (en) * 1994-12-22 1996-09-24 Lucent Technologies Inc. Method and apparatus for testing telecommunications equipment having both analog and digital interfaces
US5811984A (en) * 1995-10-05 1998-09-22 The Regents Of The University Of California Current mode I/O for digital circuits

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828281A (en) * 1973-02-26 1974-08-06 Lorain Prod Corp Impedance simulating circuit for transmission lines
US3989907A (en) * 1975-03-20 1976-11-02 Lorain Products Corporation Repeater for transmission lines of differing lengths
US4032726A (en) * 1975-03-20 1977-06-28 Lorain Products Corporation Repeater for transmission lines of differing lengths
US4359609A (en) * 1980-06-20 1982-11-16 Advanced Micro Devices, Inc. Circuit with feedback for controlling the impedance thereof

Also Published As

Publication number Publication date
GB2320380A (en) 1998-06-17
EP0848535A3 (fr) 2003-04-02
GB9625776D0 (en) 1997-01-29
US5953409A (en) 1999-09-14
EP0848535A2 (fr) 1998-06-17

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee